JPH0220209Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a galvanized pipe fixing device in a steam blowing device that is incorporated on the line of an automatic galvanizing device that continuously galvanizes steel pipes. is a galvanizing steam blowing device that fixes the galvanized pipe in a predetermined position during the process of removing excess molten zinc remaining inside the galvanized pipe pulled out of the zinc bath of the plating tank to the outside by steam blowing. This invention relates to a Metsuki tube fixing device. (Prior art) Currently, in the plating treatment method in which galvanizing is applied continuously and automatically to steel pipes, after the galvanized pipes are pulled out of the zinc bath one or several at a time, the zinc plating remaining inside the galvanized pipes is removed. In order to remove excess molten zinc from the inside of a galvanized pipe, steam is generally pumped into the pipe from one end of the pipe (hereinafter referred to as pipe blowing).

This blowing work on the inside of the pipe is performed by fixing the plated pipe in a predetermined position and pressing the steam blow outlet against one end of the plated pipe and injecting steam. Conventional fixing devices generally employ chucks. .

That is, FIG. 4 shows a conventional plated tube fixing device, and the prior art will be explained below with reference to FIG. 4. In FIG. 4, numeral 1 has a V-shaped engagement groove 2 and is attached to the fixing part 3 with the groove 2 facing downward, and 4 has a V-shaped engagement groove 5. , the lower chuck body is disposed with the groove 5 facing upward and facing the engaging groove 2. The lower chuck body 4 is attached to the upper end of the piston rod 7 of the air cylinder 6, and is moved up and down by the cylinder 6. It is configured to move. Reference numeral 8 indicates a fixing portion that fixes the lower end of the cylinder 6.

The conventional device is constructed as described above, and has a plated tube 9.
With its end engaged with the groove 5 of the lower chuck body 4, the tube 9 is pushed up by the cylinder 6 and chucked by both chuck bodies 1 and 4 to fix the tube 9 in a predetermined position.

(Problems to be Solved by the Invention) In the prior art, the plated pipe 9 is chucked and fixed by the chuck bodies 1 and 4, and therefore has the following problems.

(a) Since the outer wall surface of the plated pipe 9 is strongly pinched and chucked between the upper chuck body 1 and the lower chuck body 4, scratch marks are generated on the chucked outer wall surface of the pipe 9, which impairs the product value.

(b) Excess molten zinc adheres to the inside of the plated pipe 9 that has been pulled out of the zinc bath, and this molten zinc 10 flows downward along the inner wall surface of the plated pipe 9 as shown in the third figure. , a large amount of molten zinc will accumulate on the lower side of the tube 9.

Therefore, unlike the prior art, the upper and lower chuck bodies 1 and 4 are
When checking tube 9, check bodies 1 and 4
As the part in contact with the lower chuck body 4 is cooled, the molten zinc 10 gradually solidifies, and a lump 10a of zinc is formed near the contact part with the lower chuck body 4 (see Fig. 5).
This will reduce the product value.

The object of the present invention is to provide a fixed tube fixing device that solves the problems (a) and (b) above.

(Means for Solving the Problem) In order to solve the above problem, the present invention provides an electromagnet at the front upper part of the steam blow outlet, and a lifter at the lower part of the electromagnet. The upper half of the plated pipe is fixed by suction by the electromagnet by pushing it up to the area where it can be attracted by the electromagnet.

That is, the present invention is shown in FIGS.
To explain using FIG. 2, the present invention has an engagement groove 24 that engages with the outer wall surface of the plated pipe 9, and the engagement groove 24 is directed downward and corresponds to the outlet 15 of the steam blower 11. It has an electromagnet a disposed in the front part of the outlet 15 and an engagement groove 28 that engages with the outer wall surface of the plated pipe 9, with the engagement groove 28 facing upward and the engagement groove 28 and a lifter b arranged below the electromagnet a in correspondence with the engagement groove 24 of the electromagnet a, and configured to be raised and lowered by a lifting means, and a plated pipe 9 whose one end is pushed up by the lifter b. The structure is such that it is attracted and fixed by the electromagnet a.

In the present invention, a pressure cylinder 32 is adopted as a means for raising and lowering the lifter b, and the cylinder 32 is configured to push up the plated tube 9 supported in the engagement groove 28 to a height where it can be attracted by the magnetic force of the electromagnet a. be.

(Operation of the device) Electromagnet a is excited, lifter b pushes up the plating tube 9 to a predetermined height (a height at which the tube 9 can be attracted by the magnetic force of electromagnet a), and lifter b stops rising. When the plated tube 9 reaches a predetermined height by pushing up the plated tube 9, it is attracted by the electromagnet a and moves away from the groove 28 of the lifter b, and the upper half of the tube 9 engages with the groove 24 of the electromagnet a. It will be attracted and fixed in that position.

Then, steam is injected using the same method as before,
After blowing the inner surface of the tube, when the electromagnet a is demagnetized, the plated tube 9 falls due to its own weight and enters the engagement groove 2.
Supported by 8.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show a plated tube fixing device showing an embodiment of the present invention. In these figures, 11 is a steam blower, 12 is a circular feed pipe, 13 and 14 are ball valves and opening/closing valves installed in the pipe, 15 is a steam outlet, and the steam blower 11 has appropriate parts attached. frame 16
It is configured such that steam supplied from a steam supply section (not shown) is injected from an outlet 15. The outlet 15 is formed at the tip of the tube member 17, and the rear end of the tube member 17 is hermetically fitted to the tip of the transport pipe 12.
It is configured to be able to freely slide (expand and contract) with respect to 2.
Reference numeral 18 denotes an actuating body which is located below the tube member 17 and is movable back and forth on a guide 19 fixed to the mounting frame 16 in a direction parallel to the axis of the tube member 17, and the actuator 18 is fixed. The tube member 17, and therefore the outlet 15, is moved in the front and back direction by being fixed to the tube member 17 by a member 20 and moving the operating body 18 back and forth.

21 is a pressure cylinder such as a hydraulic cylinder or a pneumatic cylinder whose rear end is fixed to the mounting frame 16; the tip of the piston rod 22 of the pressure cylinder 21 is connected to the rear of the actuating body 18;
The cylinder 21 connects the pipe member 1 through the actuating body 18
7 is configured to move in the front and back direction.

The steam blow 11 has the above structure,
This is constructed similarly to a known steam blower.

Therefore, the present invention provides the outlet 1 of the blow 11.
5, and its configuration etc. will be explained below. The fixed tube fixing device of the present invention is composed of an electromagnet a and a lifter b.

The electromagnet a has a V-shaped engagement groove 24 that engages with the outer wall surface of the plated pipe 9, and the groove 24 is directed downward and corresponds to the outlet 15 of the blower 11. In the embodiment, it is supported by the mounting frame 16 and is configured to be movable in the vertical direction along a guide 25 fixed to the frame 16. Reference numeral 26 denotes a pneumatic cylinder fixedly disposed at a suitable part. The tip of the piston rod 27 of the cylinder 26 is connected to the upper end of the electromagnet a, and the cylinder 26 controls the vertical position of the electromagnet a, and therefore the engagement groove. 24 heights can be adjusted.
In this case, the means for vertically adjusting the electromagnet a may be of any other configuration as appropriate.

The electromagnet a is used to attract and fix the plated pipe 9, and therefore, one with a strong attraction force is used. Further, in the embodiment, three engaging grooves 24 are formed (see FIG. 2), but the number of grooves 24 can be increased or decreased as desired.

The lifter b engages with the outer wall surface of the plated pipe 9.
It has an engaging groove 28 in the shape of a letter, etc., and is disposed at the lower part of the electromagnet a so that the groove 28 faces upward and corresponds to the engaging groove 24 of the electromagnet a, and is raised and lowered by a lifting means. In the embodiment, the guide 3 is configured such that the support body 29 in which the engagement groove 28 is formed is fixed to the mounting frame 16 in the vertical direction.
An elevating member 31 arranged to be movable up and down along the
It is installed and arranged. Then, a pneumatic cylinder 32 is adopted as a lifting means, and the lower end of the cylinder 32 is fixed to the frame 16, and the cylinder 32 is
The tip of the piston rod 33 is connected to the elevating member 31. This elevating means may be of any design, such as a hydraulic cylinder or a screw and nut system. Further, the number of engagement grooves 28 of the lifter b increases or decreases in accordance with the number of grooves 24 of the electromagnet a.

The lifter b thereby pushes the plating tube 9 up to the suction range of the electromagnet a, and thereafter:
The plating pipe 9 is attracted and adsorbed from the engagement groove 28 by the attraction force of the electromagnet a, and while the plating pipe 9 is attracted to the electromagnet a, the plating pipe 9 is kept away from the engagement groove 28 of the lifter b. Therefore, the stroke of the cylinder 32 should be set in consideration of the above points. Further, depending on the diameter of the plated pipe 9, it becomes necessary to change the height of the plated pipe 9 pushed up, but this height adjustment can be done by appropriately intervening a liner or by pressing the cylinder 3.
Instead of fixing the lower end of the cylinder 32 as in the embodiment, the lower end of the cylinder 32 may be screwed together and supported by a screw member and a nut member, and the entire cylinder 32 may be configured to be adjustable in vertical movement.

34 is a proximity switch, and the switch 34 is located in front of the electromagnet a and is mounted on the mounting frame 16 so that its height can be adjusted up and down.

This switch 34 detects that the plated pipe 9 approaches and is attracted to the electromagnet a, and instructs the operating side of the cylinder 21 and the valve 14 to advance the actuating body 18 and open the valve 14. It is configured.

Note that the switch 34 is connected to the engaging groove 2 of the electromagnet a.
The same number as 4 shall be provided.

The plated tube fixing device of the embodiment is constructed as described above, and its operation etc. will be explained next.

A predetermined number of plating tubes 9, for example three at a time, are lifted out of the zinc bath of a plating tank (not shown) and supported by one end of the tube 9 being engaged in the engagement groove 28 of the lifter b by known means. Then, when the cylinder 32 is actuated to push up the plated tube 9 to a predetermined position, the plated tube 9 is attracted by the electromagnet a, and the plated tube 9 is lifted from the groove 28 and attracted to the engagement groove 24 of the electromagnet a. . At this time, the groove 28 of lifter b
is stopped at the above position. When the plated pipe 9 is attracted to the electromagnet a, the proximity switch 34 detects this state and issues a command, actuating the cylinder 21 to move the actuating member 18 forward, so that the air outlet 15 moves forward accordingly. and press it against the end of the plating tube 9. At the same time, the valve 14 is opened, so the steam supplied from the steam supply section is injected from the outlet, and is forced into the pipe 9.
It is discharged out of the tube 9 from the other end. The excess molten zinc 10 remaining inside the plated pipe 9 is washed away by this steam and flows out of the pipe 9 together with the steam. In this way, excess zinc 10
After this is removed, the valve 14 is closed, the air outlet 15 is moved back by the cylinder 21, and at the same time the electromagnet a is demagnetized. Therefore, the plated pipe 9 falls onto the engagement groove 28 under its own weight and is supported. After lowering the lifter b, the plated pipe 9 is moved to a predetermined position by a desired means.

By repeating the above operations, the inner surface of the plated tube 9 is continuously blown.

(Effects of the invention) According to the invention, the following effects can be expected.

(a) Since the upper half of the plated tube is attracted and fixed by the electromagnet a, unlike conventional chucks, it is possible to prevent scratches from occurring on the outer wall surface of the tube 9.

(b) Only the upper half of the tube 9 is attracted and fixed by the electromagnet a, and the lower half of the tube 9 is attached to the engagement groove 2 of the lifter b.
8, the lower half of the tube 9 is not cooled as in the conventional chuck type.
Therefore, unlike the conventional method, the formation of bumps 10a due to solidification of zinc can be prevented.

Although the upper half of the tube 9 may be cooled by contact with the electromagnet a, the molten zinc 10 in the upper half of the tube 9 flows downward along the inner wall surface as described above, and therefore , since the amount of zinc 10 deposited is small, bumps do not occur due to contact with electromagnet a.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of the arrangement of a galvanized plating blowing device to which the plating pipe fixing device according to the present invention is applied, Fig. 2 is a front view showing one embodiment of the plating pipe fixing device according to the present invention, and Fig. 3 is a galvanized plating blowing device to which the plating pipe fixing device according to the present invention is applied. FIG. 4 is a front view showing a conventional plating pipe fixing device, and FIG. 5 is an explanatory drawing showing its operation. 9...Plated pipe, 10... Molten zinc, 11...
Steam blow, 12... Transport pipe, 15... Outlet, 16... Mounting frame, 24, 28... Engagement groove, 32... Cylinder, 33... Piston rod, a... Electromagnet, b... Lifter.

Claims (1)

[Scope of Claim for Utility Model Registration] The plating pipe that has been lifted from the zinc bath of the plating tank is fixed in a predetermined position, and the steam blowing out from the steam blowing outlet is force-fed into the pipe from one end of the plating pipe. A galvanized steam blowing device for removing excess molten zinc inside a pipe has an engaging groove that engages with the outer wall surface of the galvanized pipe, the engaging groove is directed downward, and the engaging groove is turned downward. An electromagnet disposed in front of the outlet in correspondence with the outlet has an engaging groove with the outer wall surface of the plating pipe, and the engaging groove is turned upward and the engaging groove is connected to the electromagnet. a lifter arranged below the electromagnet in correspondence with the matching groove and configured to be raised and lowered by a lifting means, so that the plated pipe whose one end is pushed up by the lifter is attracted and fixed by the electromagnet. A galvanized pipe fixing device in a galvanized steam blowing device, characterized in that: